Push button switch



FIG. 1 is a front elevational view of a push button switch showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left side elevational view thereof;;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is an enlarged cross-sectional view of the push button switch taken along line 7--7 of the FIG. 3;

FIG. 8 is a perspective view thereof. 

The ornamental design for a push button switch, substantially as shown and described. 